chore: 更新 package.json 中的 pnpm 版本并添加 volta 配置

Author: Little-LittleProgrammer

package.json

@@ -21,6 +21,10 @@
     "lint-staged": "catalog:",
     "husky": "catalog:"
   },
-  "packageManager": "[email protected]",
-  "name": "lowcode-engine"
+  "packageManager": "[email protected]",
+  "name": "lowcode-engine",
+  "volta": {
+    "node": "18.18.2",
+    "pnpm": "8.15.9"
+  }
 }